Conservation in the 5' Region of the Long Interspersed Mouse L1 Repeat: Implications of Comparative Sequence Analysis
Overview
Authors
Affiliations
A clone of 7.1kb corresponding to the mouse L1 interspersed repeat family was selected for homology to a human interspersed repeat. This clone fairly represents mouse genomic members. Mapping of the clone revealed one common element at both the 5' and 3' ends in a head to tail arrangement, suggesting that at least some long L1 family members are tandemly arranged; genomic studies confirmed the unexpected tandem arrangement of a minor proportion of L1 members. A short SmaI tandem repeat appears to define the 5' end of most L1 family members. SmaI repeats may maintain, via a recursive regulatory function, the transcriptional viability of L1 members after retroposition events. A 2.5kb portion of the mouse L1 repeat that has not been previously sequenced is presented. It is 55-70% homologous to a corresponding portion of the human KpnI repeat family. Comparative sequence analysis revealed that one common open reading frame may conserve potential coding function across species. A second open reading frame bears an asymmetric distribution of codon replacements unlike both genes and pseudogenes. This latter feature could be consistent with a proposed chromosome organization function that is unrelated to peptide expression.
YY1 is a transcriptional activator of the mouse LINE-1 Tf subfamily.
Saha K, Nielsen G, Nandani R, Zhang Y, Kong L, Ye P Nucleic Acids Res. 2024; 52(21):12878-12894.
PMID: 39460630 PMC: 11602158. DOI: 10.1093/nar/gkae949.
YY1 is a transcriptional activator of mouse LINE-1 Tf subfamily.
Saha K, Nielsen G, Nandani R, Kong L, Ye P, An W bioRxiv. 2024; .
PMID: 38260579 PMC: 10802269. DOI: 10.1101/2024.01.03.573552.
Kong L, Saha K, Hu Y, Tschetter J, Habben C, Whitmore L Mob DNA. 2022; 13(1):13.
PMID: 35443687 PMC: 9022269. DOI: 10.1186/s13100-022-00269-z.
Expanding probe repertoire and improving reproducibility in human genomic hybridization.
Dorman S, Shirley B, Knoll J, Rogan P Nucleic Acids Res. 2013; 41(7):e81.
PMID: 23376933 PMC: 3627568. DOI: 10.1093/nar/gkt048.
Unrelated sequences at the 5' end of mouse LINE-1 repeated elements define two distinct subfamilies.
Wincker P, Roizes G Nucleic Acids Res. 1987; 15(21):8593-606.
PMID: 3684566 PMC: 306393. DOI: 10.1093/nar/15.21.8593.